FISHES 



21 



Head (Fig. 7).— The portion of the head in front of the eyes is 

 the snout. The mouth may be either terminal in position, inferior, sub- 

 inferior or superior, and may also be either horizontal or obUque 



Fig 6 —A portion of the lateral side of a fish's body between the dorsal fin (above) and 

 the anal fin (below) to illustrate the count of the scales, the lateral line series of which is m 

 the middle, and the dorso- ventral series above and below it (from Siissw. Fauna DeuL). 



(Fic^. 8) . The nostrils are four in number, two on each side immediately 

 in front of the eye. The upper jaw contains the paired premaxillary 

 bones which support its anterior portion, and also the lateral portions 

 as well, and the paired maxillaries, which He above and behind the 



